x86_64/cpu: port GDT reload procedure

3 files changed, 0 insertions, 148 deletions

diff --git a/arch/x86_64/pre/src/kernel/cpu/gdtr.cpp b/arch/x86_64/pre/src/kernel/cpu/gdtr.cpp
deleted file mode 100644
index 74a4e1c..0000000
--- a/arch/x86_64/pre/src/kernel/cpu/gdtr.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "arch/kernel/cpu/gdtr.hpp"
-
-#include "arch/context_switching/segment_descriptor_table/global_descriptor_table_pointer.hpp"
-
-namespace teachos::arch::kernel::cpu
-{
-  auto store_global_descriptor_table() -> context_switching::segment_descriptor_table::global_descriptor_table_pointer
-  {
-    context_switching::segment_descriptor_table::global_descriptor_table_pointer current_value{};
-    asm("sgdt %[output]" : [output] "=m"(current_value));
-    return current_value;
-  }
-
-  auto load_global_descriptor_table(
-      context_switching::segment_descriptor_table::global_descriptor_table_pointer const & gdt_pointer) -> void
-  {
-    asm volatile("lgdt %[input]" : /* no output from call */ : [input] "m"(gdt_pointer));
-  }
-}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/pre/src/kernel/cpu/msr.cpp b/arch/x86_64/pre/src/kernel/cpu/msr.cpp
deleted file mode 100644
index 9d6a318..0000000
--- a/arch/x86_64/pre/src/kernel/cpu/msr.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#include "arch/kernel/cpu/msr.hpp"
-
-namespace teachos::arch::kernel::cpu
-{
-  namespace
-  {
-    constexpr auto IA32_EFER_ADDRESS = 0xC000'0080;
-  }
-
-  auto read_msr(uint32_t msr) -> uint64_t
-  {
-    uint32_t low, high;
-    asm volatile("rdmsr" : "=a"(low), "=d"(high) : "c"(msr));
-    return (static_cast<uint64_t>(high) << 32) | low;
-  }
-
-  auto write_msr(uint32_t msr, uint64_t value) -> void
-  {
-    uint32_t low = value;
-    uint32_t high = value >> 32;
-    asm volatile("wrmsr"
-                 : /* no output from call */
-                 : "c"(msr), "a"(low), "d"(high));
-  }
-
-  auto set_efer_bit(efer_flags flag) -> void
-  {
-    auto const efer = read_msr(IA32_EFER_ADDRESS);
-    write_msr(IA32_EFER_ADDRESS, static_cast<std::underlying_type<efer_flags>::type>(flag) | efer);
-  }
-}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/pre/src/kernel/cpu/segment_register.cpp b/arch/x86_64/pre/src/kernel/cpu/segment_register.cpp
deleted file mode 100644
index b08c9c4..0000000
--- a/arch/x86_64/pre/src/kernel/cpu/segment_register.cpp
+++ /dev/null
@@ -1,98 +0,0 @@
-#include "arch/kernel/cpu/segment_register.hpp"
-
-#include "arch/context_switching/interrupt_descriptor_table/segment_selector.hpp"
-#include "arch/exception_handling/assert.hpp"
-
-namespace teachos::arch::kernel::cpu
-{
-  auto reload_data_segment_registers() -> void
-  {
-    asm volatile("xor %%rax, %%rax\n"
-                 "mov %%rax, %%ss\n"
-                 "mov %%rax, %%ds\n"
-                 "mov %%rax, %%es\n"
-                 "mov %%rax, %%fs\n"
-                 "mov %%rax, %%gs\n"
-                 : /* no output from call */
-                 : /* no input to call */
-                 : "rax");
-  }
-
-  auto set_data_segment_registers(context_switching::interrupt_descriptor_table::segment_selector data_segment) -> void
-  {
-    asm volatile("xor %%rax, %%rax\n"
-                 "mov %[input], %%ax\n"
-                 "mov %%rax, %%ds\n"
-                 "mov %%rax, %%es\n"
-                 "mov %%rax, %%fs\n"
-                 "mov %%rax, %%gs\n"
-                 : /* no output from call */
-                 : [input] "m"(data_segment)
-                 : "rax");
-  }
-
-  auto read_code_segment_register() -> context_switching::interrupt_descriptor_table::segment_selector
-  {
-    context_switching::interrupt_descriptor_table::segment_selector current_value{};
-    asm volatile("mov %%cs, %[output]" : [output] "=r"(current_value));
-    return current_value;
-  }
-
-  auto validate_data_segment_registers(context_switching::interrupt_descriptor_table::segment_selector data_segment)
-      -> void
-  {
-    context_switching::interrupt_descriptor_table::segment_selector ss{};
-    context_switching::interrupt_descriptor_table::segment_selector ds{};
-    context_switching::interrupt_descriptor_table::segment_selector es{};
-    context_switching::interrupt_descriptor_table::segment_selector fs{};
-    context_switching::interrupt_descriptor_table::segment_selector gs{};
-
-    asm volatile(
-        "mov %%ss, %[ss_output]\n"
-        "mov %%ds, %[ds_output]\n"
-        "mov %%es, %[es_output]\n"
-        "mov %%fs, %[fs_output]\n"
-        "mov %%gs, %[gs_output]\n"
-        : [ss_output] "=r"(ss), [ds_output] "=r"(ds), [es_output] "=r"(es), [fs_output] "=r"(fs), [gs_output] "=r"(gs));
-
-    auto result = (ss == ds && ss == es && ss == fs && ss == gs);
-    exception_handling::assert(result, "[Segment Register] Values in data register are not the same.");
-    result = (ss == data_segment);
-    exception_handling::assert(
-        result, "[Segment Register] Expected Data Segment is not the same as the value in the Stack Segment register.");
-  }
-
-  auto validate_code_segment_register(context_switching::interrupt_descriptor_table::segment_selector code_segment)
-      -> void
-  {
-    auto const cs = read_code_segment_register();
-    exception_handling::assert(
-        cs == code_segment,
-        "[Segment Register] Expected Code Segment is not the same as the value in the Code Segment register.");
-  }
-
-  auto validate_segment_registers(context_switching::interrupt_descriptor_table::segment_selector data_segment,
-                                  context_switching::interrupt_descriptor_table::segment_selector code_segment) -> void
-  {
-    validate_data_segment_registers(data_segment);
-    validate_code_segment_register(code_segment);
-  }
-
-  auto set_code_segment_register(context_switching::interrupt_descriptor_table::segment_selector data_segment,
-                                 context_switching::interrupt_descriptor_table::segment_selector code_segment,
-                                 uint64_t address) -> void
-  {
-    asm volatile("mov %%rsp, %%rax\n"
-                 "push %[data_segment]\n"
-                 "push %%rax\n"
-                 "pushfq\n"
-                 "push %[code_segment]\n"
-                 "mov %[return_function], %%rax\n"
-                 "push %%rax\n"
-                 "iretq\n"
-                 : /* no output from call */
-                 : [data_segment] "m"(data_segment), [code_segment] "m"(code_segment), [return_function] "r"(address)
-                 : "rax");
-  }
-
-}  // namespace teachos::arch::kernel::cpu